1. Accept-Language 헤더엔 어떠한 내용이 들어가는지 알아본다. 자료출처 : https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4 14.4 Accept-LanguageThe Accept-Language request-header field is similar to Accept, but restricts the set of natural languages that are preferred as a response to the request. Language tags are defined in section 3.10. Accept-Language = "Accept-Language" ":" 1#( language-range [ ";" "..